JPS6411289A - Liquid crystal projector - Google Patents

Liquid crystal projector

Info

Publication number
JPS6411289A
JPS6411289A JP16760287A JP16760287A JPS6411289A JP S6411289 A JPS6411289 A JP S6411289A JP 16760287 A JP16760287 A JP 16760287A JP 16760287 A JP16760287 A JP 16760287A JP S6411289 A JPS6411289 A JP S6411289A
Authority
JP
Japan
Prior art keywords
light
polarized
rotating element
liquid crystal
component wave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16760287A
Other languages
Japanese (ja)
Inventor
Yukio Ogura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP16760287A priority Critical patent/JPS6411289A/en
Publication of JPS6411289A publication Critical patent/JPS6411289A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

PURPOSE: To improve the use efficiency of light by providing a polarized light rotating element which changes the polarization direction of light behind a liquid crystal display plate on an optical path of at least one of three kinds of color light of red, green, and blue. CONSTITUTION: On an optical path L1 , a mirror 7 which reflects red light and a polarized light rotating element 10 which has characteristics for converting the polarization direction of light transmitted through a liquid crystal display plate 9 by 90 deg. and is rotatable are provided. On an optical path L3 , mirrors 14 and 15 which reflect blue light and a polarized light rotating element 18 which has characteristics for converting the polarization direction of light transmitted through a liquid crystal display plate 17 by 90 deg. and is rotatable are provided. The P-polarized component wave of the red light is converted into an S-polarized component wave first by using the polarized light rotating element 10 and the P-polarized component wave of the blue light is converted into an S-polarized component wave by using the polarized light rotating element 18; and color composition is performed by a dichroic prism 19. Consequently, color composite light of extremely good light use efficiency can be obtained by making good use of transmissivity characteristics as they are.
JP16760287A 1987-07-03 1987-07-03 Liquid crystal projector Pending JPS6411289A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16760287A JPS6411289A (en) 1987-07-03 1987-07-03 Liquid crystal projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16760287A JPS6411289A (en) 1987-07-03 1987-07-03 Liquid crystal projector

Publications (1)

Publication Number Publication Date
JPS6411289A true JPS6411289A (en) 1989-01-13

Family

ID=15852813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16760287A Pending JPS6411289A (en) 1987-07-03 1987-07-03 Liquid crystal projector

Country Status (1)

Country Link
JP (1) JPS6411289A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02205886A (en) * 1989-02-03 1990-08-15 Sharp Corp Liquid crystal projection device
JPH02245749A (en) * 1989-03-17 1990-10-01 Matsushita Electric Ind Co Ltd Projection display device
JPH04131815A (en) * 1990-09-21 1992-05-06 Matsushita Electric Ind Co Ltd Projection display device
JPH075412A (en) * 1993-03-15 1995-01-10 Casio Comput Co Ltd Liquid crystal projector device
JPH075410A (en) * 1992-12-02 1995-01-10 Casio Comput Co Ltd LCD projector
JPH0720435A (en) * 1994-04-25 1995-01-24 Seiko Epson Corp Projection display device
WO1999014626A1 (en) * 1997-09-18 1999-03-25 Matsushita Electric Industrial Co., Ltd. Projection image display
US6022110A (en) * 1997-07-15 2000-02-08 Nec Corporation Projection color liquid crystal display apparatus
US6152566A (en) * 1996-10-30 2000-11-28 Seiko Epson Corporation Projector for modulating polarized luminous flux
EP1646248A2 (en) 2004-10-07 2006-04-12 Seiko Epson Corporation Projector
US7963657B2 (en) 2007-03-16 2011-06-21 Sanyo Electric Co., Ltd. Projection display device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02205886A (en) * 1989-02-03 1990-08-15 Sharp Corp Liquid crystal projection device
JPH02245749A (en) * 1989-03-17 1990-10-01 Matsushita Electric Ind Co Ltd Projection display device
JPH04131815A (en) * 1990-09-21 1992-05-06 Matsushita Electric Ind Co Ltd Projection display device
JPH075410A (en) * 1992-12-02 1995-01-10 Casio Comput Co Ltd LCD projector
JPH075412A (en) * 1993-03-15 1995-01-10 Casio Comput Co Ltd Liquid crystal projector device
JPH0720435A (en) * 1994-04-25 1995-01-24 Seiko Epson Corp Projection display device
US6152566A (en) * 1996-10-30 2000-11-28 Seiko Epson Corporation Projector for modulating polarized luminous flux
US6022110A (en) * 1997-07-15 2000-02-08 Nec Corporation Projection color liquid crystal display apparatus
WO1999014626A1 (en) * 1997-09-18 1999-03-25 Matsushita Electric Industrial Co., Ltd. Projection image display
EP1646248A2 (en) 2004-10-07 2006-04-12 Seiko Epson Corporation Projector
US7963657B2 (en) 2007-03-16 2011-06-21 Sanyo Electric Co., Ltd. Projection display device

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